Make sure to replace "PUBLISHING NAME" with the name that you publish your apps under, otherwise the search will come up blank.

Although this feature is already built in to the Android Market with the "More Apps by this Publisher" button, adding the link in your App can be helpful. After a user downloads your application, they may never return the App Page in the Android market.

After using your app or game, the user may decide that they like it enough that they want to check out your other products. Adding a button to link them to the Android Market makes this easier for them.